TWIP

Twenty In Point (as in 20 twips/pixel) [Microsoft]
Found on http://www.encyclo.co.uk/visitor-contributions.php

Twip

A twip (abbreviating `twentieth of a point`, `twentieth of an inch point`, or `twentieth of an Imperial point` {Citation needed|date=March 2009}) is a typographical measurement, defined as 1/20 of a typographical point. One twip is 1/1440 inch or 17.639 µm when derived from the PostScript point at 72 to the inch, and 1/1445.4 inch or 17.573...
Found on http://en.wikipedia.org/wiki/Twip
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